That's a tough schedule to work with! I agree with the last poster in that your range is broad (though the burger night was probably just a "glitch" and not a normal calorie day for you.) But, given your schedule, I think that's just the way it's going to be. I would probably try to focus on the number of calories I'm eating per week and not stress out about individual "high calorie" 24-hour periods. When you're up for most of those 24 hours, you're obviously going to require more fuel than someone who's slept for 8 hours...same thing (in reverse) for your lower calorie days when you're catching up on your sleep.
Give it a couple weeks and see how it's going. If you're feeling good and losing weight, then, as they say, if it ain't broke, don't fix it!
When I'm hungry but short on calories, I turn to veggies and whole grains. 100 calorie microwave popcorn is my friend! And yes, popcorn counts a a whole grain!